# TB Lowtone vs QuadroSphere

The clearest difference is rating: QuadroSphere at 5.0 against TB Lowtone's 4.4. QuadroSphere also leads on update cadence (every 3 weeks vs every 3 months) and review sentiment (100% vs 85%). TB Lowtone's advantage is price ($9.99 vs $14.99). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

TB Lowtone costs $9.99 and QuadroSphere $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

QuadroSphere holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 14 and 10 respectively. Written reviews point the same way: 85% of TB Lowtone's written reviews are positive against 100% of QuadroSphere's.

TB Lowtone ships an update every 3 months, QuadroSphere every 3 weeks. The most recent releases landed on October 12, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | TB Lowtone | QuadroSphere |
| --- | --- | --- |
| Price | **$9.99** | $14.99 |
| Rating | [4.4 (14 ratings)](https://appshunter.io/ios/app/tb-lowtone/id6448315127/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/quadrosphere/id6740915664/reviews)** |
| Number of ratings | **14** | 10 |
| Positive reviews | 84.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Paid | Paid |
| Size | 13 MB | 18 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ToneBoosters](https://appshunter.io/developer/1472446500) | [4Pockets.com](https://appshunter.io/developer/370131860) |

## What reviewers say

### TB Lowtone

[App page](https://appshunter.io/ios/app/tb-lowtone/id6448315127)

This app is an innovative bass synthesizer and AUv3 plugin that uses loudness-domain harmonic synthesis for deeper, more consistent bass sounds. It features multiple oscillators, modulation options, and built-in effects, plus an AI randomizer for creating new patches.

**Highlights:** Loudness-domain harmonic synthesis, 3 analog-simulated oscillators, Voltage-controlled noise synthesizer, AI randomizer for patch generation, Extended LFOs and ADSR envelope, Pro quality effects (reverb, chorus, delay), AUv3 plugin support

**In-app purchases:** none


### QuadroSphere

[App page](https://appshunter.io/ios/app/quadrosphere/id6740915664)

This audio plugin allows musicians to sculpt immersive soundscapes by controlling stereo placement and effects across four distinct frequency bands. Create dynamic, atmospheric audio with automated movement and morphing between saved settings.

**Highlights:** 4 configurable frequency bands, Control stereo separation, level, and pan per band, Create and morph between 12 snapshots, Modulation control for automated sweeps, Per-band effects (Haas, Delay, Reverb, Chorus, Compressor), Convert mono to pseudo-stereo, MIDI CC control

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TB Lowtone free?

TB Lowtone costs $9.99, with no in-app purchases.

### Is QuadroSphere free?

QuadroSphere costs $14.99, with no in-app purchases.

### Which has better reviews, TB Lowtone or QuadroSphere?

QuadroSphere is rated higher. TB Lowtone averages 4.4 out of 5 from 14 ratings, while QuadroSphere averages 5.0 from 10 ratings.

### Do TB Lowtone or QuadroSphere have ads?

Neither TB Lowtone nor QuadroSphere shows ads.

### Which is updated more often, TB Lowtone or QuadroSphere?

TB Lowtone ships an update every 3 months, and QuadroSphere every 3 weeks. Most recently, TB Lowtone was updated on October 12, 2026 and QuadroSphere on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*